The Bimare Jav2 circa 2002-2005 mast is tougher than a old school Nokia phone. I have punished my 18HT relentlessly over the past 5 or so years and can say confidently that the mast will survive an I20 application. By the way. That mast is totally class legal in the open 20 class.
I believe that version was made by RIBA composites. Do some homework and you'll be impressed with their product.


Capt Cardiac
Ocean Springs Yacht Club
Sailor
Nacra20 - Flight of Ideas #5